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When a thin rod of length 'l' is heated ...

When a thin rod of length `'l'` is heated from `t_(1)^(0)C` to `t_(2)^(0)C` length increases by `1%` . If plate of length `2l` and breadth `'l'` made of same material is heated form `t_(1)^(0)C` to `t_(2)^(0)C`, percentage increase in area is

A

`1`

B

`2`

C

`3`

D

`4`

Text Solution

Verified by Experts

The correct Answer is:
B
`((DeltaA)/(A))100 = beta xx Deltat xx 100, beta = 2alpha`
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